Unable to update VSP from (example here) 6.3.5 to 6.3.7 or 6.4 system upgrade failed to activate dom0 image.> Within logs can see:
00:28:14 Making sure that enough disk space is available. Complete 100 0s
00:28:14 Verifying version and manifest information for Console domain and Domain-0 which are being upgraded from SP version: 6.3.6.01005.0 to: 6.3.7.0.05001 Complete 100 0s
00:28:15 Downloading the common image. Complete 100 0s
00:28:19 Downloading the Domain-0s image. Complete 100 0s
00:28:21 Downloading the console domains image. Complete 100 0s
00:28:25 Preparing to install console domains upgrade image. Complete 100 0s
00:28:32 Installing cdom upgrade image. Complete 100 0s
00:29:08 Installing dom0 upgrade image. Complete 100 0s
00:30:11 Prepare to start new Domain-0. Complete 100 0s
00:30:14 Preparing to start the new console domain. There will be a need to relogin. Complete 100 0s
00:30:19 Backing up System Platform. Complete 100 0s
00:30:58 Upgrade failed to activate dom0 image Failed 0 0s <-- Here's the error
Reboot Domain-0. Not Started 0 18m 0s *
Wait for user input to Commit or Rollback upgrade. Not Started 0 0s *
Commit or Rollback Not Started 0 5s *
00:28:23 Releasing CD/DVD/USB devices. Complete 100 0s